linux-kernel - Re: [kernel.org users] XZ Migration discussion

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Message-Id: <201002141156.21576.lasse.collin@tukaani.org>
Date:	Sun, 14 Feb 2010 11:56:21 +0200
From:	Lasse Collin <lasse.collin@...aani.org>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
Cc:	Pavel Machek <pavel@....cz>, Willy Tarreau <w@....eu>,
	Jean Delvare <khali@...ux-fr.org>,
	"linux-kernel" <linux-kernel@...r.kernel.org>, mirrors@...nel.org,
	users@...nel.org, "FTPAdmin Kernel.org" <ftpadmin@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [kernel.org users] XZ Migration discussion

On 2010-02-13 Stefan Richter wrote:
> PS:  It boils down to CPU time requirements.  For small memory
> systems, there is the XZ Embedded decompressor.

XZ Embedded saves only code size. If the file was compressed with 
settings that make the decompressor require e.g. 65 MiB RAM (xz -9), 
using XZ Embedded won't help you.

XZ Embedded is also very limited. It cannot decompress all .xz files. It 
should still be quite useful, since on some architectures it can 
compress the kernel image better than the current LZMA support in the 
kernel, and the API should be nice to use e.g. by Squashfs.

-- 
Lasse Collin  |  IRC: Larhzu @ IRCnet & Freenode
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